New type of shape memory polymer 20111845 Young Kwang Nam 20111882 Yeon chan Lim 20121793 Ah young Kim 20121832 Hyung hun An

Comparison of Young’s modulus as a function of temperature SMP : Shape memory polymer EAP : Electroactive polymer Young’s Modulus = E T E During shape recovery, E decreases Kailiang Ren, Robert S. Bortolin, and Q. M. Zhang “An investigation of a thermally steerable electroactive polymer/shape memory polymer hybrid actuator”, 2015

T Yield stress Comparison of yield stress as a function of temperature H. Tobushi, S. Hayashi2, Y. Sugimoto, c and K. Date1“Performance of shape memory composite with SMA and SMP”, 2009

Comparison between shape retention ratio and the extent of stress relaxation. R(ret) : shape retention R(𝜎) : stress relaxation R(𝜎) = 100% ×(1− 𝜎/ 𝜎 0 ) Qian Zhao, Weike Zou, Yingwu Luo, Tao Xie “Shape memory polymer network with thermally distinct elasticity and plasticity, “,2016

Sensitive on Tg Difficulty in recovery from external force Tan delta curve for polymer viscosity Tan delta= 𝐿𝑜𝑠𝑠 𝑚𝑜𝑑𝑢𝑙𝑢𝑠 𝑠𝑡𝑜𝑟𝑎𝑔𝑒 𝑚𝑜𝑑𝑢𝑙𝑢𝑠 elasticity Tan delta Recovery ratio Sensitive on Tg Difficulty in recovery from external force Ryan D. Siskinda and Ralph C. Smith “Model Development for Shape Memory Polymers”, 2006

Making specimens SMP resin Solute SMP Composites Filament extruders 3d printer filament

Reinforcement of shape memory polymers Reinforcement by microfibers, fabrics, and mats Reinforcement by carbon nanotubes (CNTs) or carbon nanofibers (CNFs) Reinforcement by exfoliated nanoclay Reinforcement by SiC or SiO2 particles Reinforcement by cellulose nanowhiskers Harper Meng, A review of stimuli-responsive shape memory polymer composites, 2013, Polymer

Buy composites Milled fiber glass Milled carbon fiber Powder Specification - Average filament diameter (𝜇𝑚) : 13.5 - Average fiber length (𝜇𝑚) : 300 - Density (g/ 𝑐𝑚 3 ) : 2.58 \ 12,700 / 800 g Milled carbon fiber Powder Specification - Average filament diameter (𝜇𝑚) : 7~10 - Average fiber length (𝜇𝑚) : 100 - Density (g/ 𝑐𝑚 3 ) : 1.6 \ 184,560 / 1 kg SiC Powder Specification - Average powder diameter (𝜇𝑚) : 6 - Shape : powder - Density (g/ 𝑐𝑚 3 ) : 3.22 \ 232,000 / 1 kg

Young’s modulus related composites Glass fiber Carbon fiber SiC Glass fiber Takeru Ohki, Mechanical and shape memory behavior of composites with shape memory polymer, 2004, Composites Part A Qing-Qing Ni, Shape memory effect and mechanical properties of carbon nanotube/shape memory polymer nanocomposites, 2007, Composite Structures Ken Gall, Shape memory polymer nanocomposites, 2002, Acta Materialia

Rigidity N Recovery ratio Recovery ratio Revovery ratio of glass fiber containing shape memory composite Rigidity Recovery ratio N Recovery ratio Jinho Hong, Ju Ho Yun Il Kim, and Sang Eun Shim”Shape Memory Polymer Nanocomposites”,2010

Young’s modulus of ratio of silica By adding C SiC Less decrease of recovery ratio Increase of rigidity Hua Zou, Shishan Wu, and Jian Shen “Polymer/Silica Nanocomposites: Preparation, Characterization, Properties, and Applications”, 2008

Shape recovery rate of mixture of SiC with SMP Image of the unconstrained bend Shape recovery rate of mixture of SiC with SMP Jinho Hong, Ju Ho Yun Il Kim, and Sang Eun Shim”Shape Memory Polymer Nanocomposites”,2010

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